Our approach is achievable for other blockchain networks as well, with the mechanism tuned to the respective consensus methodologies. Ethereum blockchain network is transitioning from PoW to PoS consensus [1]}. The transition is supposed to be through enabling the use of Casper [2]}, a hybrid PoW/PoS protocol. Here, the PoS is applied to finalize the blocks after a fixed number of blocks are mined through PoW. This change aims to reduce the chances of illicit activities such as invalidating the blocks, forming a parallel chain, and disrupting the communication by forfeiting the deposit of the validators. However, still, there is no provision to stop social-engineering based illicit activities such as Phishing, money laundering, Gambling. Applying the reputation model based on transaction data paves the way for identifying the entities using blockchain for the aforementioned illicit activities. The identification helps in curtailing the power of the proposer and validator accounts involved in such social-engineering based illicit activities within the blockchain network.
